Anti-sift powder boxes



Dec. 27, 1955 v. DAMANT ETAL 2,723,513

ANTI-SIFT POWDER BOXES Filed Feb. 26, 1952 l ilallallaqyfi United States Patent() ANTI-SIFT POWDER BOXES Laurence V. Damant, Westmount, Quebec, and George R. Grischkat, Montreal, Quebec, Canada, assignors to F. N. Burt Company, Inc., Buffalo, N. Y., a corporation of Delaware Application February 26, 1952, Serial No. 273,412

3 Claims. (Cl. 229-6) This invention relates to improvements in containers and more particularly to containers constructed principally of fibrous material such as cardboard, paper, fibreboard, and the like, and particularly adapted for containing toilet powders or similar finely divided materials, and constructed and arranged to prevent sifting of the material during shipment or other handling of the containers.

It is a general object of the invention to provide for boxes or containers of the class mentioned, an improved and simplified structure for the base section thereof and having an improved arrangement of telescoping parts cooperating not only to provide an effective anti-sift structure but also accomplishing economies in production costs.

A further object of the invention is to provide in containers of the class mentioned, an improved self-sustaining sleeve member preferably constructed of sheet plastic or cellulosic material, adapted to be combined in an improved manner with the shell or drum member of the container to bind the container parts together so as to form an anti-sift structure.

Still another object of the invention is to provide for containers of the class mentioned, an improved plastic sleeve member or unit capable of separate manufacture and ot' being quickly and easily assembled with the drum section of the container prior to complete assembly of the base section.

Another object of the invention is to provide for containers of the class mentioned, an improved plastic sleeve member or unit which is self-sustaining and capable of quick and easy assembly with other elements of the container base and being formed with fianges at its upper and lower edge portions for connecting the container bottom and other elements of the container base in assembled relation.

Other objects of the invention will be in part pointed out in the following detailed disclosure of an illustrative but preferred embodiment of the invention, and will be in part obvious as the disclosure proceeds.

The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in the claims.

For a more complete disclosure of the nature, objects and advantages of the invention, reference is had to the following detailed description of the illustrative embodiment and to the accompanying drawings, in which:

Figure 1 is a top perspective view of a container embodying the invention;

Figure 2 is an enlarged central transverse vertical section of the container shown in Figure l, parts being shown in elevation and the showing being partially diagrammatic;

Figure 3 is a top perspective view of the self-sustaining sleeve member used in the construction of the base of the container;

2,728,513 Patented Dec. 27, 1955 Figure 4 is a top perspective view of the drum member which forms a receiving compartment;

Figure 5 is a perspective view of the bottom member or disc of the base section;

Figure 6 is a perspective view of the closure disc for the bottom; and

Figure 7 is a fragmentary view in vertical section of the lower portion of the container showing a slightly modified embodiment.

Referring to the drawing for a detailed description of the illustrative embodiment, the invention is shown in connection with a powder container which is substantially circular in horizontal section although it will be understood that the invention is equally applicable to containers of other shapes in horizontal section, oval, polygonal, etc. The base or base section of the container, indicated ygenerally at S, is the part of the container providing the powder receiving compartment. This base includes a drum or shell 9 preferably constructed of fibrous material such as cardboard or the like, and includes a vertical wall 10 surrounding the powder receiving compartment. The drum 9 is closed at its upper end by a frangible sheet or membrane 11 which may be of cellulosic material such as Cellophane stretched over the upper edge of the drum, contacting with the upper edges of the side walls thereof and turned downwardly at margins 12 which are preferably adhesively attached to the outer surface of the drum. The drum 9 contacts at its lower edge portion with the bottom 13 of the base section, this bottom preferably also being of cardboard or similar fibrous material. The bottom 13 is provided with a filling opening 14 surrounded by a marginal groove or seat 15 in which a closure disc 16 is seated for forming a tight anti-sift joint. This filling opening is ordinarily used for filling the container with powder. The lower edge of the drum wall 10 is formed to provide a tight anti-sift joint with the bototm 13 of the container. This bottom disc 13 is of slightly greater diameter than that of the drum so as to project outwardly marginally as at 17 beyond the drum walL As best shown in Figures 2 and 3 a self-sustaining skirt member or sleeve 18 of sheet material surrounds the drum 9 being substantially the same shape in horizontal section as that of the drum. This sleeve is preferably constructed of plastic, such as cellulosic material, for example, cellulose acetate, and it is of suiiicient thickness and stiffness to be self-sustaining, being drawn or formed into shape and then assembled with the drum and other parts of the vcontainer base. The rlower edge portion of the plastic sleeve 18 is4 formed with an outturned flange 19 preferably extending continuously around the sleeve. The outer marginal portion of the annular flange 19 is turned downwardly at 20 thus forming a seat 21 for the reception of the marginally extending portions 17 of the bottom closure disc 13. In its completed form the lower edge portion of the downturned fiange .20 is turned inwardly at 22 so as to underlie the marginal portion of the bottom closure disc 13 thus retaining the latter in its normal assembled position as shown in Figure 2.

At its upper edge portion the plastic sleeve 18 is preferably formed with an inturned flange 23 which may extend entirely around the upper edge of the sleeve. This flange 23 overlies the upper edge of the drum wall 10 and may, as shown in Figure 2, contact with the closure membrane 11 closely adjacent to the upper edge of the drum wall 10. It will be noted that the flange 23 is angled downwardly, and the plastic being of a resilient or springy nature, the inner margin of the flange will bear with a light resilient pressure upon the upper portion of the drum assembly and make a neat sealing contact with the transparent closure sheet 11. The inner edge of the fiange 23 not only increases the tautness of the transparent closure sheet 11 by bearing resiliently upon it, but also provides a ledger edge or guide for making an even break when the transparent sheet 11 is ruptured for the purpose of obtaining access to the material. On the other hand, it may be advantageous for some purposes to position the flange 23 so as to contact directly with the upper edge of the drum wall. This flange 23 is thus adapted to hold the drum in its normal assembled position with its normal edge contacting with the bottom closure disc 13 so as to provide a substantially sift-proof joint along this lower edge.

As mentioned above the plastic sleeve 18 is formed to shape prior to assembly with the other elements of the base section of the container. The sleeve may be advantageously formed from a fiat sheet of plastic material, being pressed or drawn to form the cylindrical side wall with the upper and lower flanges above described. When the sleeve is thus drawn from a lsheet of plastic, a portion thereof at the upper end of the sleeve is removed or cut out along a line corresponding to the inner edge of the flange 23, the removed portion being discarded. This provides the flange 23 as above described and also forms an access opening adjacent to the frangible drum head 11. This access opening may be of any desired shape and size. Also the out-turned and downwardly turned flanges 19 and 20 are formed during this drawing or pressing operation prior to assembly of the sleeve in the base section.

When the sleeve 18 has been formed as above described and as shown in Figure 3, it is in condition to be assembled with the other elements of the container base. The drum 9 is then telescoped into the sleeve, these parts being sized so that the drum fits tightly within the sleeve with a friction fit, thus retaining these two parts in assembled relation. In Figure 2 the downturned enveloping margin 12 of the exceedingly thin cellulosic membrane 11 is indicated as embedded slightly in the outer surface of the drum wall 10. Due to the necessity of exaggerating thicknesses in the drawings, this showing is quite diagrammatic in this respect and represents the best available way of depicting the close fit of the plastic sleeve 18 with the drum-container assembly. Suice it to say that the drum, together with the liange 12 of the transparent covering sheet 11' seats tightly within the sleeve 18 with a direct friction fit so as to retain the parts in assembled relation. Ordinarily there is some 30 or the like to cover the outer or lower surface of the box bottom, as suggested in Figure 7.

The cover section 24 of the container may be of any preferred known structure. As shown, this cover includes a cylindrical member 25 of cardboard or the like which may be covered with any preferred decorative sheet material 26 of paper, plastic, or the like. The cover 24 is constructed for telescoping relation with the outer surface of the base section and to contact at its lower edge in limiting relation with the out-turned peripheral iiange 27 formed by the projecting marginal portion 22 of the bottom and by the flange 19 at the lower edge of the sleeve 18.

From the foregoing disclosure, it will be seen that the self-sustained plastic skirt or sleeve 18 strengthens and reinforces the cardboard shell or drum 9 so as to form a reinforced unit embodying only this single cardboard element 9, no additional cardboard shell being required. When the shell 9 and sleeve 18 are assembled in telescoped relation as described, they form substantially a single container unit or drum enclosing the receiving compartment of the container. This drum unit is capable of separate manufacture to be later assembled into the complete container. The connections between the drum wall 10 and the sleeve 18 and between this sleeve and the bottom 13 are substantially tight and sift-proof and form a strong container structure which is resistant to rough usage during handling, etc. so that the sift-proof qualities are effectively maintained.

It is emphasized again that one ot the important features of the present invention, which provides a neat, cornpact and Well-finished container and also affords economies in manufacture, is the provision of the self-sustaining plastic shell or sleeve member 18 which not ony assists in reinforcing and binding the parts of the base structure firmly together, but at the same time furnishes an adequate finishing surface for the container, without the necessity of applying glossy paper finishing sheets to the tendency to adhesion between the outer surface of the cardboard wall 10 and the inner surface of the sleeve 18 so as to retain the parts in assembled condition, but it may be advantageous in some conditions to apply. lan adhesive between the drum and sleeve for retaining them more positively in assembled relation. Also, it will be noticed that a tight joint is formed between the outer surface of the drum 9 and the inner surface of the sleeve 18 so as to avoid passage or sifting of any powder that may have escaped beneath the lower edge of the drum wall 10.

When the drum 9 has been assembled by telescoping it into the plastic sleeve 18 as above described, the bottom 13 of the container is placed in position by inserting it into the seat 21 at the lower edge ofthe sleeve. The lower edge portion 22 of the flange 20 is then drawn or turned inwardly so as to contact with the lower marginal surface ofthe bottom thus providing a firm attachment binding the drum 9, sleeve 18 and the bottom 13 firmly and in finally assembled position and forming an anti-sift connection around the projecting margin 17 of the box bottom. When the bottom is thus applied and the box has been filled with powder through the filling opening 14, the closure disc 16 may be sealed in closing position and, in order to complete the seal and to form a finish for the bottom of the box, itmay be desirable to adhesively attach a sealing and finishing disc of paper drum structure.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interrupted as illustrative and not in a limiting sense.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

l. In a box for pulverulent material or the like, a material receiving base part having an annular side wall portion, a cover sheet resting thereon, and a fiat bottom wall portion, and a cover member having a top wall portion and a depending annular side wall flange adapted to closely embrace the side wall portion of said base part,

' the outer peripheral marginal portion of said bottom wall portion projecting radially outwardly from the base part to provide va seat for the lower rim of the annular cover flange when the box is closed; said base part comprising a flat bottom Wall forming sheet of stiff material, and an annular side wall forming element of similar stiff material, the lower rim of which abuts the marginal portion of said bottom wall sheet inwardly-from the edge thereof; a finishing and binding element constituting the sole means for uniting the bottom and side wall elements of the base part, said nishing element comprising an annular piece of sheet material of self-sustaining but somewhat tiexible and resilient consistency and capable of being drawn or pressed to a relatively permanent set, a flange on the upper rim of said last named` element drawn inwardly and downwardly in a somewhat conical configuration over the top of said side wall forming element of the base part and depressing slightly said cover sheet, and a clamping enveloping portion extending from the lower rim of said finishing element and drawn outwardly, then downwardly, and -then inwardly to embracetheradially projecting margin of said bottom wall forming sheet to firmly unite said side wall element and said bottom wall element without the use of adhesive and in a non-sifting manner.

2. In a box for pulverulent material or the like, a material receiving base part having an annular side wall portion, a covering sheet resting thereon, and a bottom wall portion, and a cover member having a top wall porn tion and a depending annular side wall flange adapted to closely embrace the side wall portion of said base part, the outer peripheral marginal portion of said bottom wall portion projecting radially outwardly from the base part to provide a seat for the lower rim of the annular cover ange when the box is closed; said base part comprising a bottom wall forming sheet of stiff material, and an annular side wall forming element of similar stiff material, the lower rim of which abuts the marginal portion of said bottom wall sheet inwardly from the edge thereof; a finishing and binding element, said finishing element comprising an annular piece of sheet plastic material of self-sustaining but somewhat exible and resilient consistency and capable of being drawn or pressed to a relatively permanent set, a flange on the upper rim of said last named element drawn inwardly and downwardly in a somewhat conical configuration over the top of said side wall forming element of the base part and depressing slightly said cover sheet, and a clamping enveloping portion extending from the lower rim of said finishing element and drawn outwardly, then downwardly, and then inwardly to embrace the radially projecting margin of said bottom wall forming sheet to rmly unite said side wall element and said bottom wall element in a non-sifting manner.

3. In a box for pulverulent material or the like, a material receiving base part having an annular side wall portion and a bottom wall portion, and a cover member having a top wall portion and a depending annular side wall lange adapted to closely embrace the side wall portion of said base part; said base part comprising a bottom wall forming sheet of stiff material, and an annular side wall forming element of similar stiff material, the lower rim of which abuts the marginal portion of said bottom wall sheet; a nishing and binding element, said last named element comprising an annular piece of sheet material of self-sustaining but somewhat flexible and resilient consistency and capable of being drawn or pressed to a relatively permanent set, a flange on the upper rim of said last named element drawn inwardly over the top of said side wall forming element of the base part, and a clamping enveloping portion extending from the lower rim of said finishing element to embrace the margin of said bottom wall forming sheet to firmly unite said side wall element and said bottom wall element in a non-sifting manner, the upper rim of the side wall forming element of the base part having secured to it a frangible sheet stretched over the top of said side wall element to provide a temporary top enclosure for confining the material in the base part, the flange on the upper rim of the finishing element extending over the margins of said frangible sheet and in direct edge contact therewith to provide a cutting ledger or guide edge for neatly breaking said sheet, the nishing and binding arrangement extending somewhat above the upper rim of the side wall element of the base member and its upper liange being directed inwardly and downwardly in somewhat a conical configuration to bear resiliently directly upon the frangible sheet to maintain it in taut unwrinkled condition.

References Cited in the tile of this patent UNITED STATES PATENTS 1,582,631 Bruns Apr. 27, 1926 1,609,290 Broderick Dec. 7, 1926 1,735,853 Dreux Nov. 19, 1929 2,211,885 Dreux Aug. 20, 1940 

